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Investing in the public benefit OfficialAnthropic NewsOct 18Popular Musk Pledges SpaceX Shares to ‘Every Kid in America’ WebBloomberg TechnologyOct 19Popular Websites are closing their doors to AI agents WebThe Verge AIOct 17 This is the new ChatGPT Voice, powered by GPT Live OfficialOpenAI on YouTubeOct 18 How AI giants will reshape global philanthropy WebAxios AIOct 19 Gemini 4 Argon Really Surprised Me WebTwo Minute PapersOct 19 Google Gemini 4 agents just beat Minecraft with no human intervention WebEngadget AIOct 19 Who could it be? 🧐 OfficialGoogle on YouTubeOct 18 Anthropic gives outside AI watchdog “employee-like” access WebArs Technica AIOct 18 What are self-replicating ‘AI worms’, and why is Anthropic worried about them? WebThe Guardian AIOct 18
GlossaryProductsIntermediate

API

Also written: Python API, Python Application Programming Interface, API Interactions, API calls, Claude API, 1P API, First-party API, API tokens

An API is a set of rules that lets different software programs communicate with each other.

In plain terms

An API, or Application Programming Interface, is like a waiter in a restaurant. You tell the waiter what you want from the kitchen (the software), and the waiter brings it back to you. You don't need to know how the kitchen works, just how to ask the waiter.

For example, when you use a weather app on your phone, the app doesn't have all the weather data itself. It uses an API to ask a weather service's computer for the current temperature and forecast, and then displays that information to you. This allows different software systems to work together without needing to understand each other's internal details.

The expert version

An Application Programming Interface (API) defines a contract between software components, specifying how they can interact. It consists of a set of definitions, protocols, and tools for building software. APIs abstract away the implementation details of a service, exposing only the necessary functions and data structures to external clients.

This allows for modularity, enabling developers to integrate third-party services or build complex systems from smaller, independent parts. Tradeoffs include potential performance overhead due to abstraction layers and the need for careful API design to ensure usability and maintainability.

Why it matters now

Recent news highlights how companies are making their AI models more accessible and controllable. Developers are building more complex applications by integrating AI features directly into their software, often using APIs to connect different systems and automate tasks.

Where it shows up 77 items, newest first
How each company uses it
Anthropic Claude
Anthropic provides an API for developers to integrate their AI models into their own software.
Google Gemini
Google Gemini's new models are available for building complex AI applications, implying API access for integration.
Microsoft Copilot
Microsoft Copilot can now interact with desktop apps, automating tasks in older software, sometimes without needing traditional APIs.
OpenAI ChatGPT
OpenAI's tools and new models are pushing AI capabilities forward for developers, suggesting API access for integration.
Related terms

SDKRESTWebhooksMicroservicesCloud ComputingPrompt Engineering

Often confused with
SDK
An SDK (Software Development Kit) is a collection of tools, libraries, and
Library
A library is a collection of pre-written code that developers can use i
Protocol
A protocol is a set of rules for data transmission, while an API is a
Origin

The concept of an API has roots in early operating systems and software design principles emphasizing modularity and abstraction. The term "Application Programming Interface" became widely recognized with the rise of graphical user interfaces and the need for software components to interact. Source ↗

Try this about 5 minutes

You can try using an API by signing up for a free tier on a platform like OpenAI or Google AI Studio. Then, use their provided documentation to make a simple request, such as asking a language model to write a short poem or generate a basic image, and see the response returned.

Try it: Playbook entries that use thisPlaybook →

The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.

Questions people ask

What is the difference between an API and a website?
A website is what you see and interact with in a browser, while an API is a behind-the-scenes interface that allows different software programs to communicate with each other.
Do I need to be a programmer to use an API?
While APIs are designed for software developers, some platforms offer no-code or low-code tools that use APIs to build applications without extensive programming knowledge.

First seen on Subvolts Jun 11, 2020. Updated Oct 16, 2026. Written by an AI model from the items above and reviewed against them weekly; report an error.